The whole-floor space in Manhattan's Flatiron neighborhood is warm, bright, and impressive -- a great way to give your tiny startup an extra feeling of legitimacy to potential partners.

And with a large communal space and classroom, it should quickly become one of the city's go-to venues for after-work socializing and meetups. General Assembly is already planning sessions on building web apps, "Design thinking with IDEO," law for entrepreneurs, and "lean" user experience design.

As impressive as the office space is its initial "class" of entrepreneurs working here, such as the Yipit team, Art.sy, CollegeOnly, and others.

And some of General Assembly's impressive roster of partners include IDEO, Skype (which donated TVs), and the city of New York, which donated $200,000 to support the space and programming.

We get off the elevator and meet Adam Pritzker, General Assembly cofounder and our tour guide. Here he shows off the "Campus Map," a map of the space.

Dan Frommer, Business Insider

Here's the "Campus Map" key, describing the various functions of different areas of the office, including "coworking," "pillow fighting," "whiteboarding," etc.

Dan Frommer, Business Insider

Ryan Matzner, Fashism's Brooke Moreland, and G.A. intern Etan Berkowitz hang out in the entry way/reception area. The black board in the background contains the names of the companies who either work there (Yipit, Art.sy, etc.) or are partners (Idea, Skype, etc.). The letters are magnetic so they can be changed as tenants move in and out.

Obligatory kitchen shot. Crucial: Two dishwashers.

Another common space, which can be walled off for meetings, seminars, etc.

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Brew PR's Brooke Hammerling shows off the locker/mailroom gadgets that will be installed in this room.

Dan Frommer, Business Insider

In another room, a bunch of HDTVs that Skype donated. These will be set up for Skype videoconferencing, presentations, etc.

Dan Frommer, Business Insider

Nothing interesting in here! Though at least the building used the tiles that make it feel like you're in the Paris Metro.

Dan Frommer, Business Insider

This is a classroom that will be available for classes, seminars, and other programming. (General Assembly promises they'll be much more than a workplace, with all sorts of classes and sessions open to the public/broader tech community.)

Dan Frommer, Business Insider

Here's one of the work spaces.

Dan Frommer, Business Insider

If you look up, you can see the lighting is very neat in here, too: Pipes snaking around the ceiling with light tubes coming out of the ends. By Brooklyn-based Karl Zahn.